SOLVING ALGAE PROBLEMS - FRENCH EXPERTISE AND WORLD-WIDE APPLICATIONS

This paper reviews the various methods available for removing plankton ic microalgae (microstraining, direct filtration, sedimentation, flota tion, polishing using ozonation and granular activated carbon [O-3 + G AC], membrane filtration), and discusses their comparative effectivene ss, optimisation and limitations. Also described are the treatments co nsidered most effective in the removal of odorous and/or toxic metabol ites. In each case French technology and its world-wide applications a re compared to those documented in the literature. The article conclud es with recommendations on the most appropriate processes for treating eutrophic waters.